EP1313832B1 - Surfactant system - Google Patents

Surfactant system Download PDF

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Publication number
EP1313832B1
EP1313832B1 EP01964733A EP01964733A EP1313832B1 EP 1313832 B1 EP1313832 B1 EP 1313832B1 EP 01964733 A EP01964733 A EP 01964733A EP 01964733 A EP01964733 A EP 01964733A EP 1313832 B1 EP1313832 B1 EP 1313832B1
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EP
European Patent Office
Prior art keywords
alkyl
pyrrolidone
weight
apg
composition according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP01964733A
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German (de)
English (en)
French (fr)
Other versions
EP1313832A4 (en
EP1313832A1 (en
Inventor
Steven Kritzler
Alex Sava
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Novapharm Research Australia Pty Ltd
Original Assignee
Novapharm Research Australia Pty Ltd
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Publication date
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Application filed by Novapharm Research Australia Pty Ltd filed Critical Novapharm Research Australia Pty Ltd
Publication of EP1313832A1 publication Critical patent/EP1313832A1/en
Publication of EP1313832A4 publication Critical patent/EP1313832A4/en
Application granted granted Critical
Publication of EP1313832B1 publication Critical patent/EP1313832B1/en
Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/32—Organic compounds containing nitrogen
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Disinfection or sterilisation of materials or objects, in general; Accessories therefor
    • A61L2/16—Disinfection or sterilisation of materials or objects, in general; Accessories therefor using chemical substances
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Disinfection or sterilisation of materials or objects, in general; Accessories therefor
    • A61L2/16—Disinfection or sterilisation of materials or objects, in general; Accessories therefor using chemical substances
    • A61L2/18—Liquid substances
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/662—Carbohydrates or derivatives
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/26—Organic compounds containing nitrogen
    • C11D3/28—Heterocyclic compounds containing nitrogen in the ring
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/38—Products with no well-defined composition, e.g. natural products
    • C11D3/386—Preparations containing enzymes, e.g. protease or amylase

Definitions

  • the invention relates to a surfactant system for use in aqueous compositions and more particularly to a surfactant system for use in, or addition to, aqueous enzyme based cleaning preparations.
  • the invention has particular advantage when employed in enzyme based cleaning preparations intended for use for cleaning medical instruments.
  • compositions for cleaning medical instruments are intended broadly to include surgical instruments such as scalpels, biopsy instruments, clamps, endoscopes, colonoscopes, laparoscopes and other paraphernalia used for surgical investigation or intervention; and other instruments used in the practice of medicine, surgery, and dentistry which require cleaning, disinfection or sterilisation.
  • the term is also intended to include instruments having similar cleaning requirements such as those used in hairdressing, cosmetic treatments, tattooing, body piercing as well as other applications where removal of human/animal sebum and/or body secretion is required.
  • Many medical instruments are made from or incorporate a variety of construction materials and cleaning compositions must be such as not to attack any such materials.
  • Preparations for use in cleaning medical instruments consist generally of a concentrate comprising one or more surfactants in combination with one or more proteolytic enzymes.
  • the concentrate is diluted to a working strength (normally a hundredfold dilution) prior to use.
  • NOVO NORDISK Novo-formulation
  • Three preparations used internationally for this purpose are EPIZYME ® a product of 3M, MEDIZYME ® (a product of Whiteley Industries Pty Ltd., Sydney Australia) and ENDOZYME ® (a product ofRuholf Corporation, NY, USA). While such products are generally effective and widely used there remains a need for products which are more efficient, and especially for preparations which are capable of achieving a predetermined level of effectiveness within a shorter time than those currently available.
  • the concentrate must be sufficiently stable in transit and storage prior to use to satisfy the needs of commerce.
  • the choice of surfactants which in practice can be formulated in concentrated aqueous solutions is limited. Either the surfactants limit the storage stability of the concentrate, resulting in problems of foaming on dilution, provide insufficient reduction in surface tension, destabilize other components of the system such as enzymes, or suffer from other disadvantages.
  • formulators utilize surfactants chosen from a small group of conventional and well known nonionic surfactants which have been found to be satisfactory for such uses, but there remains an unsatisfied demand for formulations of improved efficiency.
  • the invention provides an aqueous composition comprising in combination an alkyl pyrrolidone and an alkyl polysaccharide.
  • alkyl pyrrolidone is a C8 - C18 linear alkyl pyrrolidone.
  • N-DP N-dodecyl pyrrolidone
  • the alkyl polysaccharide is an alkyl polyglucoside (“APG").
  • the invention provides a method of enhancing the efficacy of an enzyme containing composition for use in cleaning medical instruments comprising the step of including an alkyl pyrrolidone and an alkyl polysaccharide.
  • the composition is a concentrate which contains surfactant according to the first aspect as part of its formulation, but the surfactant system can be added subsequently either to the concentrate or the working solution.
  • the invention provides a method of cleaning a medical instrument including the step of treating the instrument with a composition including at least one enzyme, an alkyl pyrrolidone and an alkyl polysaccharide.
  • Alkylpyrrolidones are known to reduce surface tension progressively with increasing concentration in water achieving a minimum surface tension (maximum effectiveness) at a concentration of about 0.1% in the case of dodecyl pyrrolidone and about 0.002% in the case of octyl pyrrolidone, which concentrations correspond to the maximum solubility of the respective pyrrolidones in water. This has in the past inhibited their use in concentrates, since the maximum concentration in an aqueous system is inevitably less than fully effective as a surfactant when diluted to any substantial degree.
  • N-DP N-dodecyl pyrrolidone
  • APG alkyl polyglucoside
  • MEDIZYME® a product described by NOVO INDUSTRIES in Novo Nordisk Publications Application Sheet B-613, "Application of Enzymes in Detergents for Endoscope Cleaning", was also prepared and tested.
  • the additive consisted of 0.2%w/w N-dodecyl pyrrolidone ("N-DP") and 0.1%w/w of alkyl polyglucoside (“APG”) in each case based on the weight of the concentrate.
  • the NOVO Formulation (Concentrate) is as follows: Component %w/w Non-ionic surfactant (Teric BL9) 12 Propylene Glycol 22 Triethanolamine 7 Boric acid 4 Calcium Chloride 0.1 Savinase 16.0L (Protease) 13 Ternamyl (Amylase) 7 Water to 100 pH 7
  • the Epizyme composition (concentrate) is as follows: Component %w/w Tap water 19.0 Teric BL9 (non ionic surfactant) 10.0 Preservative 0.15 Enzyme stabilizer 6.0 50% caustic soda 2.5 Propylene Glycol 6.0 Protease 10.0 Lipase 0.2 Amylase 1.5 Cellulase 0.5 Perfume 0.15 Water to 100.0
  • protease may be subtilisin, the amylase Alpha-amylase, the cellulase may be endo-1,4-beta-glucanase and the lipase may be Triacylglycerol.
  • other enzymes or combinations of enzymes may be substituted for these.
  • Each of the cleaning composition concentrates were diluted at a rate of 1 part of concentrate in 100 parts of standard hard water (0.304 g calcium chloride and 0.065g of magnesium chloride per 1L of distilled water. Therapeutic Goods Order 54 & Guidelines, 1996, p. 17).
  • the efficacy of each product was then tested against standard soil preparations on glass slides, (1) neat and (2) with the addition of an additive according to the invention.
  • the efficiency of the preparation was measured at various temperatures. The results are shown in Table 1 in comparison with results of compositions including the additive according to the invention.
  • the addition of the additive reduces the time required for the composition to achieve a given score and does so at each temperature.
  • the additive is especially effective at lower temperatures.
  • the ratio of N-DP to APG can be varied. It is preferred that the ratio be between 1 part by weight of alkyl pyrrolidone to 3 parts by weight of alkyl polyglucoside and 3 parts by weight of alkyl pyrrolidone to 1 part by weight of alkyl polyglucoside, more preferably between 3 parts by weight of alkyl pyrrolidone to 1 part by weight of alkyl polyglucoside and 1 part by weight of alkyl pyrrolidone to 1 part by weight of alkyl polyglucoside.
  • the concentration of N-DP and APG is each preferably less than 7.5% w/w of the concentrate (ie less than about .0075% in the concentrate at dilution of 1 part concentrate: 100 parts water) and more preferably is less than 3% w/w.
  • concentrations employed will depend on the surface tension properties required, the hydrophilicity of the alkyl polyglucosides and the degree ofhydrotroping provided by other excipients in the formulation to the alkyl polyglucoside, as well as other factors which may occur with respect to individual formulations.
  • Table 2 shows the effect of the additive in accelerated aging tests. The results demonstrate that the additive slightly improves storage stability, or, at least, does not adversely affect it.
  • Table 3 shows the effects of varying the concentration and ratio of the alkylpyrrolidone and alkylpolyglucoside. It can be seen that the composition is efficacious in reducing contact times for cleaning over a wide range of alkylpyrrolidone to alkylpolyglucoside ratios.
  • Soil carrier glass microscope slides Burnt minced meat. Contact time (min) required to achieve score 8. NOVO-formulation Epizyme neat With APG + SURF Neat With APG + SURF 25 °C 95 66 67 48 40 °C 60 49 52 39 50 °C 42 32 30 22 Milk in microwave.
  • Soil carrier glass microscope slides Burnt minced meat. Contact time (min) required to achieve score 8. NOVO-formulation Epizyme neat With APG + SURF neat With APG + SURF 25 °C 95 64 67 44 40 °C 60 47 52 37 50°C 42 31 30 22 Milk in microwave. Contact time (in min) required to achieve score 10 (full removal) NOVO-formulation Epizyme neat With APG + SURF neat With APG + SURF 25 °C 53 34 35 21 40 °C 39 28 24 16 50 °C 27 20 12 7 Edinburgh Soil.
  • Soil carrier glass microscope slides Burnt minced meat. Contact time (min) required to achieve score 8. NOVO-formulation Epizyme neat With APG + SURF neat With APG + SURF 25 °C 95 67 67 44 40 °C 60 44 52 41 50 °C 42 30 30 20 Milk in microwave. Contact time (in min) required to achieve score 10 (full removal) NOVO-formulation Epizyme neat With APG + SURF neat With APG + SURF 25 °C 53 37 35 24 40 °C 39 26 24 15 50 °C 27 18 12 12 Edinburgh Soil.
  • Soil carrier glass microscope slides Burnt minced meat. Contact time (min) required to achieve score 8. NOVO-formulation Epizyme neat With APG + SURF neat With APG + SURF 25 °C 95 63 67 49 40 °C 60 52 52 37 50 °C 42 35 30 23 Milk in microwave. Contact time (in min) required to achieve score 10 (full removal) NOVO-formulation Epizyme neat With APG + SURF neat With APG + SURF 25 °C 53 35 35 24 40 °C 39 27 24 16 50 °C 27 24 12 9 Edinburgh Soil.
  • the microwave was pre-heated by placing 6 water-filled beakers in a circle on the glass turn-table and leaving it on "high" (900 W) for 10 minutes. Then, the beakers with water were replaced by beakers with 10 ml of milk. The milk was heated for 10 minutes at 450 W, then allowed to cool, forming a skin, and placed into an oven for 2 hours at 80°C.
  • Mince meat - 20 grams of beef mince - 7.5 grams of egg yolk and whites - 8.0 gram of water 30x30 mm polar substrate (ceramic tiles)
  • the mince was mixed with the egg yolk and water with the use of a hand blender. 1g of homogenized mixture was spooned onto 3x3 cm ceramic tiles, onto the smooth side. Then the tiles were left in an oven for 10 minutes. Edinburgh Soil - 20 g egg yolk - 20 g water - 0.5 g cholesterol - 3 g beef gelatin - 0.45 hog mucin
  • the beef gelatin and water were blended together and heated until the mixture obtained a homogenous consistency. Cholesterol, hog mucin and egg yolk were blended in after gelatin was cooled to 30°C. 0.1 g of soil was deposited onto surfaces of the microscope slides. The smears were made of a uniform thickness for each set of slides; the thickness was regulated by a border of adhesive tape along each border of the smearing instrument In order to simulate the conditions of an endoscope cleaning, the slides were left to dry in open air at 20°C for 20 minutes.
  • the polysaccharide appears to stabilize the pyrrolidone, the combination being more soluble in the concentrate and resulting in substantially improved lowering of surface tension at the working dilution.
  • test results utilize N-dodecyl pyrrolidone
  • other alkyl pyrrolidones could be substituted therefore, and especially C8 to C18 alkyl pyrrolidones.
  • the amount to be added can be determined by simple trial but in general increasing the concentration significantly above the levels herein employed tends to give a decreasing advantage.
  • other alkyl polysaccharides may be substituted for APG.
  • other sugar units and derivatives of sugar units may be substituted for glucose units.
  • beneficial effects are obtainable with at least some soils by adding it in isolation.
  • the optimum ratio of N-DP to APG can be determined by simple trial for a given concentrate.
  • the combination of the invention provides an improved surfactant system which is expected to have application in many end-uses.
  • the surfactant system of the invention may be simply added to commercially available enzyme cleaning products either to the concentrate or, at an appropriate dilution to the working solution prior to use.
  • the additives are incorporated into a concentrate at the time of manufacture of the concentrate which is then merely diluted prior to use.
  • Additives according to the invention may be added to dishwashing, hand washing and other surface cleaning compositions.
  • Embodiments of the invention may be altered and may have other chemicals added or substituted therefore to an extent which will be apparent to those skilled in the art from the teaching hereof without departing from the inventive concept herein disclosed.
  • FIG. 1 A diagrammatic representation of this method is shown in figure 1.
  • a protease is allowed to hydrolyse azocasein for 30 minutes at 40°C. Undigested protein is precipitated with trichloroacetic acid and the quantity of digested product is determined by spectrophotometry.
  • Activity is determined relative to a standard of known activity and the result given in the same units as used for the standard.
  • the detergent bases should be included in the standard solutions unless it is already known that the particular formulation being used has no effect on the protease activity.
  • the concentration of the base detergent should be equal to that used in the sample solution of the detergent containing protease.
  • Anson Unit the amount of enzyme* which digests haemoglobin A an initial rate such that there is liberated per minute an amount of TCA-soluble product which gives the same colour with phenol reagent as one milliequivalent of tyrosine. * Under reaction conditions given in the NNAS method AF4/5-GB: Modified AnsonHaemoglobin Method for the Determination of Proteolytic Activity.
  • a standard curve is prepared using an enzyme whose activity in Anson Units is known. Unknowns are then compared to this curve.
  • KNPU Kilo Novo Protease Unit
  • KNPU 1000 NIPU
  • NPU the amount of enzyme* which hydrolyzes casein at such a rate that the initial rate of formation of peptides/minute corresponds to 1 micromole of glycine/minute * Standard conditions given in NNAS method 162/3-GB: Manual DMC Method for the Determination of Proteolytic Activity.
  • DPU Durazym Protease Unit
  • the activity is measured relative to a Durazym standard with the same units as the sample i.e. DPU.
  • a standard curve is prepared using an enzyme whose activity in DPU is known. Unknowns we then compared to this curve

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Epidemiology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Molecular Biology (AREA)
  • Detergent Compositions (AREA)
  • Enzymes And Modification Thereof (AREA)
EP01964733A 2000-09-01 2001-08-30 Surfactant system Revoked EP1313832B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPQ984400 2000-09-01
AUPQ9844A AUPQ984400A0 (en) 2000-09-01 2000-09-01 Surfactant sytem
PCT/AU2001/001094 WO2002018530A1 (en) 2000-09-01 2001-08-30 Surfactant system

Publications (3)

Publication Number Publication Date
EP1313832A1 EP1313832A1 (en) 2003-05-28
EP1313832A4 EP1313832A4 (en) 2004-08-25
EP1313832B1 true EP1313832B1 (en) 2006-10-11

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ID=3823898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01964733A Revoked EP1313832B1 (en) 2000-09-01 2001-08-30 Surfactant system

Country Status (18)

Country Link
US (1) US6939836B2 (https=)
EP (1) EP1313832B1 (https=)
JP (2) JP4896355B2 (https=)
KR (2) KR100853257B1 (https=)
CN (1) CN1247754C (https=)
AR (1) AR030593A1 (https=)
AT (1) ATE342328T1 (https=)
AU (2) AUPQ984400A0 (https=)
BR (1) BRPI0113783B8 (https=)
CA (1) CA2421035C (https=)
DE (1) DE60123812T2 (https=)
DK (1) DK1313832T3 (https=)
ES (1) ES2275718T3 (https=)
MY (1) MY140244A (https=)
NZ (1) NZ524912A (https=)
PT (1) PT1313832E (https=)
TW (1) TWI289602B (https=)
WO (1) WO2002018530A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2918663A1 (de) 2014-03-14 2015-09-16 Bode Chemie GmbH Reinigungsmittel für unbelebte oberflächen mit spezieller wirksamkeit gegen schleim, sekrete, blut und biofilme

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPQ984400A0 (en) * 2000-09-01 2000-09-28 Novapharm Research (Australia) Pty Ltd Surfactant sytem
AU2004232373B2 (en) * 2003-04-22 2010-07-29 Novapharm Research (Australia) Pty Ltd Endoscope cleaning pad
AU2003901917A0 (en) * 2003-04-22 2003-05-08 Novapharm Research (Australia) Pty Ltd Endoscope cleaning pad
JP4633482B2 (ja) * 2005-01-17 2011-02-16 花王株式会社 医療用殺菌洗浄剤組成物
JP2009538976A (ja) * 2006-06-01 2009-11-12 スリーエム イノベイティブ プロパティズ カンパニー 洗浄組成物
US7491362B1 (en) * 2008-01-28 2009-02-17 Ecolab Inc. Multiple enzyme cleaner for surgical instruments and endoscopes
JP5508414B2 (ja) * 2008-07-14 2014-05-28 スリーエム イノベイティブ プロパティズ カンパニー ヒドロゲル高濃縮クリーニング剤からのクリーニング溶液の作製方法及びパッケージ化された高濃縮クリーニング剤
CN114225072B (zh) * 2014-04-15 2024-01-02 勃林格殷格翰国际公司 在制造生物制品期间连续灭活病毒的方法、装置和系统
KR20160067714A (ko) 2014-12-04 2016-06-14 주식회사 엘지화학 코폴리카보네이트 및 이를 포함하는 물품

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2918663A1 (de) 2014-03-14 2015-09-16 Bode Chemie GmbH Reinigungsmittel für unbelebte oberflächen mit spezieller wirksamkeit gegen schleim, sekrete, blut und biofilme
DE102014003484A1 (de) 2014-03-14 2015-09-17 Bode Chemie Gmbh Reinigungsmittel für unbelebte Oberflächen mit spezieller Wirksamkeit gegen Schleim, Sekrete, Blut und Biofilme

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Publication number Publication date
AUPQ984400A0 (en) 2000-09-28
ATE342328T1 (de) 2006-11-15
KR100853257B1 (ko) 2008-08-20
MY140244A (en) 2009-12-31
EP1313832A4 (en) 2004-08-25
BRPI0113783B8 (pt) 2021-07-27
JP2012072409A (ja) 2012-04-12
WO2002018530A1 (en) 2002-03-07
CA2421035C (en) 2010-09-28
CN1462307A (zh) 2003-12-17
BR0113783B1 (pt) 2013-11-12
BR0113783A (pt) 2005-02-01
US20030220222A1 (en) 2003-11-27
US6939836B2 (en) 2005-09-06
JP4896355B2 (ja) 2012-03-14
EP1313832A1 (en) 2003-05-28
JP2004506812A (ja) 2004-03-04
DE60123812T2 (de) 2007-08-02
TWI289602B (en) 2007-11-11
ES2275718T3 (es) 2007-06-16
WO2002018530A9 (en) 2002-09-06
CA2421035A1 (en) 2002-03-07
NZ524912A (en) 2004-09-24
DK1313832T3 (da) 2007-02-19
AR030593A1 (es) 2003-08-27
CN1247754C (zh) 2006-03-29
KR20080042943A (ko) 2008-05-15
AU2005100493A4 (en) 2005-07-28
KR20030031176A (ko) 2003-04-18
PT1313832E (pt) 2007-01-31
HK1055604A1 (en) 2004-01-16
KR100894491B1 (ko) 2009-04-22
DE60123812D1 (de) 2006-11-23

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